Alert archive / Missouri / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 16, NWS St. Louis, MO

April 24, 1993Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 24, 1993, 10:23 PM CDT for Saint Louis County, Missouri. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Apr 24, 1993, 10:23 PM CDT (03:23 UTC)
Expired
Apr 24, 1993, 11:00 PM CDT
In force
37 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Saint Louis County, MO

The radar

The St Louis radar (KLSX), 22 km from the middle of the area, began a volume at 03:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 3.4 hours before the alert went out and 232 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Paducah/Barkley, KY at 00:00Z on 1993-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 158 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Paducah/Barkley, KY at 00:00Z on 1993-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
158 J/kg
Mixed-layer CIN
-304 J/kg
Mixed-layer LCL
1187 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTL 250328
SVRSTL
MOC189-250400-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1023 PM CDT SAT APR 24 1993
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL MISSOURI
 
   ...NORTHERN ST LOUIS COUNTY
 
AT 1025 PM...A SEVERE THUNDERSTORM WAS 15 MILES WEST OF THE CITY OF ST.
LOUIS...4 MILES NORTHEAST OF CHESTERFIELD. 1 INCH HAIL HAS BEEN
REPORTED WITH THIS STORM. THE STORM WAS MOVING TO THE NORTHEAST AT 25
MILES AN HOUR AND WILL BE IN THE FLORISSANT BY 1045 PM.
 
 MORSE
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
 
 
&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 24, 8:40 PM CDT, 1 hour 43 minutes before
MOZ012-250230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
834 PM CDT SAT APR 24 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF EAST CENTRAL
MISSOURI UNTIL MIDNIGHT...

AT 830 PM...SCATTERED THUNDERSTORMS HAD DEVELOPED 25 MILES WEST OF THE C
YST. LOUIS...IN WESTERN ST. LOUIS COUNTY.  THE STORMS WERE MOVING TO THE
NORTHEAST AT 35 MILES AN HOUR AND WILL MOVE ACROSS BALLWIN...AND INTO
THE FERGUSON AND FLORISSANT AREAS BETWEEN 9 AND 915 PM.

THESE STORMS WILL PRODUCE VERY HEAVY RAIN...FREQUENT DANGEROUS
LIGHTNING...AND SMALL HAIL AS THEY MOVE THROUGH ST. LOUIS
COUNTY.  FRANKLIN COUNTY OFFICALS REPORTED 1/2 INCH HAIL IN UNION AT
832PM.  TAKE SHELTER INSIDE AND STAY AWAY FROM WINDOWS UNTIL THE STORMS
PASS.

MORSE/FERRY

&
Special weather statement, Apr 24, 8:51 PM CDT, 1 hour 32 minutes before
MOZ006-009-010-011-013-014-250245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
850 PM CDT SAT APR 24 1993

...SEVERE THUNDERSTORM WATCH FOR CENTRAL MISSOURI UNTIL MIDNIGHT...

AT 845 PM VERY STRONG THUNDERSTORMS WERE IN CENTRAL MISSOURI IN A 5 MILE
WIDE BAND FROM ABOUT SEDALIA TO ABOUT 25 MILES SOUTH OF SEDALIA NEAR
WARSAW. OTHER VERY STRONG THUNDERSTORMS WERE 40 MILES EAST OF JEFFERSON
CITY NEAR HERMANN...AND ABOUT 30 MILES NORTHEAST OF COLUMBIA NEAR MEXICO.
THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 35 MILES AN HOUR AND
WILL LIKELY PRODUCE SMALL HAIL...NUMEROUS DEADLY CLOUD TO GROUND
LIGHTNING STRIKES...ALONG WITH TORRENTIAL RAIN THAT COULD REDUCE
VISIBILITIES TO NEAR ZERO WHILE DRIVING.

IF SEVERE WEATHER IS SPOTTED GET TO A SAFE PLACE IMMEDIATELY. GO TO THE
BASEMENT OR TO THE INTERIOR ROOM OF A HOUSE...AWAY FROM WINDOWS. WHEN
IT IS SAFE RELAY ANY SEVERE WEATHER REPORTS TO THE NEAREST LAW
ENFORCEMENT AGENCY SO IT CAN BE PASSED ALONG TO THE NATIONAL WEATHER
SERVICE. STAY TUNED TO NATIONAL WEATHER SERVICE RADIO OR COMMERCIAL
BROADCASTS FOR THE LATEST STATEMENTS OR WARNINGS ACROSS CENTRAL
MISSOURI TONIGHT.

LA GREE
Special weather statement, Apr 24, 9:20 PM CDT, 1 hour 3 minutes before
MOZ011-012-250315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
914 PM CDT SAT APR 24 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF EAST CENTRAL
MISSOURI UNTIL MIDNIGHT...

AT 915 PM...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM 20 MILES NORTH
OF ST. LOUIS IN ST. CHARLES COUNTY TO 50 MILES WEST OF ST. LOUIS TO 55 M
ESOUTHWEST OF ST. LOUIS IN SOUTHWEST FRANKLIN COUNTY.  THE STORMS WERE
MOVING TO THE NORTHEAST AT 35 MILES AN HOUR.  THE STRONGEST STORM IN
THIS LINE WAS IN SOUTHERN WARREN COUNTY NEAR HOLSTEIN...OR 45 MILES WEST
OF ST. LOUIS.

THE STORMS WILL PRODUCE TORRENTIAL RAINS...GUSTY WINDS AND DANGEROUS
LIGHTNING IN FRANKLIN AND ST. CHARLES COUNTLY BETWEEN 930 AND 1030 PM.
STAY INSIDE AND AWAY FROM WINDOWS AND DO NOT USE THE TELEPHONE OR
ELECTRICAL APPLIANCES UNTIL THE STORMS PASS.

MORSE/FERRY
Special weather statement, Apr 24, 9:50 PM CDT, 33 minutes before
MOZ006-009-010-011-013-014-250245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
945 PM CDT SAT APR 24 1993

...SEVERE THUNDERSTORM WATCH FOR CENTRAL MISSOURI UNTIL MIDNIGHT...

THUNDERSHOWERS..SOME WITH VERY HEAVY RAINS CONTINUED ACROSS CENTRAL
MISSOURI AT 940 PM CDT.  THE BROAD AREA OF GENERAL SHOWERS WAS SOUTH
OF A LINE FROM KANSAS CITY TO HANNIBAL AND COVERED ALL OF CENTRAL
MISSOURI.  THE HEAVIEST SHOWERS WERE IN AN AREA ABOUT 40 MILES IN
DIAMETER AND CENTERED OVER CALIFORNIA...ABOUT 20 MILES SOUTHWEST OF
COLUMBIA.  OTHER HEAVY SHOWERS WERE WIDELY SCATTERED FROM 40 MILES
NORTHWEST OF COLUMBIA..AROUND SALISBURY..TO CENTRALIA AND MEXICO..
ABOUT 25 MILES NORTHEAST OF COLUMBIA.

THE SHOWERS AND THUNDERSHOWERS WERE MOVING TO THE NORTHEAST AROUND
25 MILES AN HOUR.  NO SEVERE WEATHER WAS REPORTED OR INDICATED BY
RADAR IN CENTRAL MISSOURI THIS EVENING.
LB
Special weather statement, Apr 24, 9:55 PM CDT, 28 minutes before
MOZALL-250430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
955 PM CDT SAT APR 24 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTHERN AND
CENTRAL MISSOURI UNTIL MIDNIGHT...
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A SMALL PART OF EAST
CENTRAL MISSOURI UNTIL 100 AM CDT...
...A TORNADO WATCH IS ALSO IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH
CENTRAL MISSOURI UNTIL 100 AM CDT...

AT 945 PM...SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER MUCH OF
MISSOURI.  THE STRONGEST STORMS EXTENDED FROM WEST OF ST LOUIS INTO
CENTRAL MISSOURI...AND FROM THE SPRINGFIELD AREA SOUTHWEST INTO
NORTHERN ARKANSAS.  THESE STORMS WERE MOVING EAST TO NORTHEAST AT
35 MILES AN HOUR.

IF YOU LIVE IN SOUTHWEST OR SOUTH CENTRAL MISSOURI...REMAIN ALERT
FOR SEVERE THUNDERSTORMS AND POSSIBLE TORNADOES.  CONDITIONS REMAIN
FAVORABLE FOR THE DEVELOPMENT OF TORNADOES.  LARGE HAIL...FREQUENT
LIGHTNING AND VERY HEAVY RAIN ARE ALSO THREATS.  IF STORMS MOVE INTO
YOUR AREA...TAKE SHELTER AND LISTEN FOR POSSIBLE WARNINGS.

FOR RESIDENTS OF CENTRAL AND EAST CENTRAL MISSOURI...SEVERE THUNDERSTORMS
ARE STILL POSSIBLE THIS EVENING WHICH MAY PRODUCE LARGE HAIL AND DAMAGING
WIND.  IF A WARNING IS ISSUED FOR YOUR COUNTY OR AREA...STAY INDOORS AND
LISTEN FOR LATER STATEMENTS.

SEVERE THUDERSTORM WATCH #155 HAS BEEN DROPPED FOR THE IMMEDIATE KANSAS
CITY AND SEDALIA AREA...BUT REMAINS IN EFFECT EAST AND SOUTH OF THERE.

SHEAj
Special weather statement, Apr 24, 10:12 PM CDT, 11 minutes before
MOZ012-250400-

SPECIAL WEATHER STATEMENT AND SHORT-RANGE FORECAST
NATIONAL WEATHER SERVICE ST LOUIS MO
1008 PM CDT SAT APR 24 1993

...STRONG THUNDERSTORMS CONTINUE WEST AND NORTH OF ST LOUIS...

AT 1006 PM...AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED
FROM ABOUT 15 MILES NORTH OF ST LOUIS DOWN INTO WESTERN ST LOUIS
COUNTY.  MOVEMENT OF THESE WAS NORTHEAST AT 35 MILES AN HOUR.

CITIES AND COMMUNITIES WEST AND NORTH OF ST LOUIS CITY CAN EXPECT
THUNDERSTORMS WITH VERY HEAVY RAIN...FREQUENT LIGHTNING AND SMALL HAIL
THROUGH 1130 PM.

IF YOU ARE DRIVING...VISIBILITIES MAY BE REDUCED TO A FEW YARDS IN AREAS
OF HEAVY RAIN.  WHEN A STORM MOVES INTO YOUR AREA...REMAIN INDOORS AND
KEEP INFORMED OF THE LATEST WEATHER CONDITIONS IN CASE A WARNING IS
ISSUED.  LISTEN FOR NOAA WEATHER RADIO FOR WEATHER INFORMATION.

SHEA

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 7:23 PM CDTSevere Thunderstorm WarningLSXLincoln26 min
Apr 24, 9:22 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Warren38 min
Apr 24, 10:37 PM CDTSevere Thunderstorm WarningLSXSaint Charles53 min
Apr 25, 12:28 AM CDTSevere Thunderstorm WarningLSXCrawford35 min
Apr 25, 12:38 AM CDTSevere Thunderstorm WarningLSXDent, Reynolds52 min
Apr 25, 12:41 AM CDTSevere Thunderstorm WarningLSXSaint Francois, Washington49 min
Apr 25, 12:45 AM CDTSevere Thunderstorm WarningLSXWashington45 min
Apr 25, 12:59 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve46 min
Apr 25, 1:14 AM CDTSevere Thunderstorm WarningLSXJefferson33 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1993Every severe thunderstorm warning in 1993

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.